From 9e00fddf4355aeaf8b3dcacf90bde40abc89face Mon Sep 17 00:00:00 2001
From: Robot <robot@IRAS-Dell-Latitude.IRAS>
Date: Mon, 3 Jul 2017 21:48:09 +0800
Subject: [PATCH] fixed bug of abs

---
 src/model/quadrotor.cxx | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/model/quadrotor.cxx b/src/model/quadrotor.cxx
index 42ecbe60..ebbccffb 100644
--- a/src/model/quadrotor.cxx
+++ b/src/model/quadrotor.cxx
@@ -41,10 +41,10 @@ void QRCalculateAllRotorPos(const float* pos, const float* att, float strut, flo
     float v4[3] = {0.0, -strut, 0.0};
 #else
     // shape: x
-    float v1[3] = {strut/1.41421356, strut/1.41421356, 0.0};
-    float v2[3] = {-strut/1.41421356, strut/1.41421356, 0.0};
-    float v3[3] = {-strut/1.41421356, -strut/1.41421356, 0.0};
-    float v4[3] = {strut/1.41421356, -strut/1.41421356, 0.0};
+    float v1[3] = {strut/(float)1.41421356, strut/(float)1.41421356, 0.0};
+    float v2[3] = {-strut/(float)1.41421356, strut/(float)1.41421356, 0.0};
+    float v3[3] = {-strut/(float)1.41421356, -strut/(float)1.41421356, 0.0};
+    float v4[3] = {strut/(float)1.41421356, -strut/(float)1.41421356, 0.0};
 #endif
 
     rotate_vector(v1, rpos1, att[0]*RAD2DEG, att[1]*RAD2DEG, att[2]*RAD2DEG);
@@ -365,7 +365,7 @@ void QRdynamic::quadrotor_controller_pid(void)
     /*  Phase 3: Yaw, heading control */
     float err_yaw = QR_yaw_ref - QR_att[2]; // ref = 0. (North)
     float err_yaw_sign;
-    if (abs(err_yaw) > M_PI) {
+    if (std::abs(err_yaw) > M_PI) {
         if (err_yaw > M_PI)
             err_yaw_sign = -1.;
         else